CVE-2021-23970

Firefox ESR and 1 other: Context-specific code was included in a shared jump table; resulting in assertions being triggered in…

CVE-2021-23970 is fixed in 4 products on 2 platforms, first by firefox 86.0+build3-0ubuntu0.18.04.1, released February 26, 2021. It is not reported as exploited. Patch Radar priority: Routine.

RoutineFixed on 2 platforms
CVSS
6.5
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0101
63rd percentile

Context-specific code was included in a shared jump table; resulting in assertions being triggered in multithreaded wasm code. This vulnerability affects Firefox < 86.

Where it's fixed

ProductFixed inFixReleased
Windows apps
Mozilla Firefox ESR (en-US) 91.0 Mozilla Firefox ESR (en-US) 91.0 Aug 4, 2021
Linux
firefox · Ubuntu 18.04.6 LTS (bionic) 86.0+build3-0ubuntu0.18.04.1 firefox 86.0+build3-0ubuntu0.18.04.1 Feb 26, 2021
firefox · Ubuntu 20.04 LTS (focal) 86.0+build3-0ubuntu0.20.04.1 firefox 86.0+build3-0ubuntu0.20.04.1 Feb 26, 2021
firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) 86.0+build3-0ubuntu0.18.04.1 firefox-geckodriver 86.0+build3-0ubuntu0.18.04.1 Feb 26, 2021
firefox-geckodriver · Ubuntu 20.04 LTS (focal) 86.0+build3-0ubuntu0.20.04.1 firefox-geckodriver 86.0+build3-0ubuntu0.20.04.1 Feb 26, 2021
firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) 86.0+build3-0ubuntu0.18.04.1 firefox-mozsymbols 86.0+build3-0ubuntu0.18.04.1 Feb 26, 2021
firefox-mozsymbols · Ubuntu 20.04 LTS (focal) 86.0+build3-0ubuntu0.20.04.1 firefox-mozsymbols 86.0+build3-0ubuntu0.20.04.1 Feb 26, 2021

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